Support for this work is provided by the U.S. Department of Homeland Security's Science and Technology Directorate (
Cybersecurity N66001-08-C-2029,
SISTER HHSP 233201600012C
),
the National Science Foundation Internet Laboratory for Empirical Network Science (
PANDA NSF OAC-1724853,
iLENS CNS-0958547,
Science Gateway NSF ACI--1547611),
and Cisco's University Research Program.